Esp32 5v sensor Now let's complicate things by using 2 5V hall effect sensors with the esp32 and ethernet poe. the ADC is returning the same value for all inputs, even when two are floating and a third is connected to a 3. Avoid resets and brownouts by choosing the right adapters, cables, and capacitive buffering - especially when running Wi-Fi, sensors, or peripherals that draw high current. We provide detailed instructions, codes, wiring diagrams, video tutorials, and explanations for each code line to help you start easily with ESP32. Discover how to measure voltage with an ESP32, use a voltage sensor, and program your ESP32 step by step. Dec 29, 2024 · 0 I’m trying to use an MQ2 gas sensor with my ESP32, but I’m having some issues. Find this and other ESP32 tutorials on ESP32IO. Jun 13, 2021 · Hi All - I’m building a pool controller with temperature and pressure using a Esp32 DevC board. Jul 31, 2025 · ESP32 dev modules usually have (at least one) 5V pin, that can be used as 5V output, and (at least one) 3. On the pressure sensor i’m getting a lot of inconsistent readings of voltage. Now to my probably stupid beginner questions: I believe that even in deep sleep, the 5V output of the ESP still provides power, so the sensor keeps consuming energy even when it's not doing anything. Sep 24, 2015 · In this tutorial, I show how you can shift a signal from 5V to 3. 3V I’m golden. , sensors, displays) are connected. The output is 0-5V and I read ESP32 can only manage 3,3V so I used two resistors as voltage dividers before connecting it to GPIO 32. This circuit connects a Raspberry Pi 4B to an MLX90614 infrared temperature sensor using an Adafruit 4-channel I2C-safe Bi-directional Logic Level Converter. Jan 4, 2025 · Struggling with your DHT22 sensor on ESP32? Learn why rushing the reads gives you 0% humidity—and how to get clean, reliable data every time. I have the temperature working just fine. Nov 11, 2023 · The ESP32 is an awesome little microcontroller board that has taken the IoT world by storm. 3V pin, that can be used as a 3. How to program for ESP32 to turn fan on/off. 7kΩ -> GND). There are many types of analog sensors, LDRs (Light Dependent Resistors), current and voltage sensors being popular examples. Apr 2, 2025 · The DFRobot Digital 360° Tilt Sensor V1. Is this correct? Can an ESP32 board deliver 5V? Could I for Aug 4, 2024 · The sensor itself needs to be operated from 5V otherwise it malfunctions. To make life easier, I created a custom library for the Arduino Learn: how the HC-SR501 motion sensor works, how to connect the motion sensor to ESP32, how to code for the motion sensor, how to program ESP32 step by step. RP2040: GPIO26 through GPIO29 can be used. 0 is designed to operate with a working voltage of either 3. Jul 2, 2025 · Note that some sensors require a 5V output instead of a 3. The ESP32 collects data from a DHT11 temperature and humidity sensor and a vibration sensor, controls a buzzer, and displays information on an OLED screen. I will use a divider but I don't know what resistors to use. 0)? May 9, 2019 · The -0. The board integrates Wi-Fi/Bluetooth communication, motor driver control, and IMU sensor, making it suitable for IoT and robotics applications. Typically, the 3V3 regulator on a ESP32 developer board is capable of delivering 150mA, which happens the be the max Idraw of the ESP32. The DHT22 / AM2301 will be powered by 5V directly from the Power Supply and will be connected via Level Shifter to the ESP32 GPIO. 5V, the 5V label on your board says "5V" but the output should actually be around 4. ESPHome configuration looks like this: Jul 31, 2025 · I connected the sensor directly to the ESP32 and checked the SCL and SDA pins, which showed a voltage of 5V. 0 / 1024. The level converter is used to safely step down the 5V I2C signals from the Raspberry Pi to the 3. Nov 7, 2022 · Interface SHT31 Temperature and Humidity Sensor with ESP32 using ESP-IDF library and display sensor readings on a terminal, pinout The Keyestudio ESP32 37 in 1 sensor kit mainly contains 37 commonly used sensors and modules, an ESP32 board, an ESP32 expansion board and Dupont wires. 3v pin? Or is it safe to use either of those sensors on a 5v pin? Or maybe both sensors on the 5v? I'm very new to all of this so i apologize for the elementary Jan 2, 2024 · The MQ-135 is 5V and the output is analog, which will also be 5V. It is known for its high accuracy, ease of use, and capability to connect multiple sensors to a single GPIO pin, each with a unique 64-bit serial code. Jan 4, 2023 · HC-SR04 module with an ESP32 Schematic Schematic to be made Schematic to be made What is the power supply of the module: 5V or 3. Since there is a good chance of using WiFi on a microcontroller designed to use it, only the ADC1 and its 8 channels can be used. What would happen if someone were to connect a 5V I2C sensor to it? How can I prote I also have a YF-S201 Hall Effect Flow sensor, powered by 5v and outputs digital pulses that correspond to flow, also at 5v. I have an ESP32-S3 board but since the sensor requires a 5V power supply to operate, I would need the expansion board sinc… Mar 11, 2024 · Serial. I planned to power the 5 sensors with 3. Fully simulated on Wokwi with real-time Serial Monitor output, and extendable to Blynk for remote monitoring and alerts. An emergency stop (E Stop) is connected for safety purposes, allowing the system to be quickly deactivated. Is that correct? I am powering the sensor with 5V from the ESP32, and am connecting the signal wire (yellow one) to PIN 34. You cannot directly measure analog voltages between 0 and 5V. Componentes: ESP32 con una placa de radio de Silicon Labs Placa de pruebas larga Motor de CC (quiero usarlo como ventilador) Motor de CC (quiero usarlo como extractor) Módulo de relé de 2 canales Puente H (L293) (Tengo un módulo L293D Motor Shield) Sensor de gas Jun 6, 2022 · The pressure sensor is a 100psi 0-4,5volt sensor with a vdd of 5V. 9V. Here is the methods for converting 5V sensor to 3. This is to avoid sending power into the PC's USB port. The thing about these sensors is when you operate them from 5V there will be 5V on their digital pin as well if I connect it to the ESP32 then the voltage goes down to 3. ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. com. there is no problem with the power supply. I connected the sensor directly to the ESP32 and checked the SCL and SDA pins, which showed a voltage of 5V. Feb 4, 2025 · Important Notes Most ESP32 boards, including ESP32 DevKit V1, have a voltage regulator on Vin, allowing safe operation with 5V input. The Hi-Link LD2410 mmWave radar sensor is a game-changer for precise human presence detection Sep 12, 2021 · I want to connect Sharp GP2Y1014AU0F Dust Sensor with an ESP32. 3v Apr 12, 2021 · Hi, I am trying to read the temperature sensor on a motorcycle engine, it ranges from 0-5v. When motion is detected (it triggers an interrupt) and the ESP32 starts a timer. With built-in WiFi and Bluetooth connectivity, lots of peripherals, and low power consumption, the ESP32 is the perfect choice for connected devices and wireless sensor networks. ESP32-C3: RISC-V based variant with Wi-Fi and Bluetooth LE Each variant has its strengths, making the ESP32 family versatile enough to cater to a wide range of project requirements. Jan 29, 2023 · The ESP32 uses 3V3 for GPIO, the ESP32 does not have an on bord developer 5Vreg. Analog Mar 2, 2025 · Here we are going to experiment Sensor Value Web Server using ESP32 to Display real time sensor value on web page and updating it without reloading the page using AJAX request handling. Jun 2, 2025 · Looking to measure distance using ESP32? The HC-SR04 Ultrasonic Sensor is a fantastic module for beginners and professionals alike. From what I understood, I was under the impression that the 5V pin is an Input and not an Output. Is there anyway I can read this signal on the ESP32 while leaving the Unfortunately the sensor will return voltage anywhere from 0 - 5v, so I need to convert that down to 0-3. For example, if the sensor is pushing 2. ESP32 is a feature-rich SoC with integrated Wi-Fi and Bluetooth connectivity for a wide-range of IoT applications. 3V; it can tolerate voltages slightly higher than normal but not that much. Jun 28, 2025 · Overview This article is about the usage of the LD2410 Human Presence Detection Sensor with ESP32. 5V on the raw input voltage. 3V sensor on I2C bus1 and the 5V sensor (with the 10K pull downs) on I2C bus2. The ESP32 series employs either a Tensilica Xtensa LX6, Xtensa LX7 or a RiscV processor, and both dual-core and single-core variations are available. Oct 27, 2025 · This tutorial shows how to detect motion with ESP32 using a PIR motion sensor. I've already done the preheating process for the MQ2 sensor, but the analog reading from the sensor always shows 0 in the serial monitor. Perfect for beginners who want to master ESP32-CAM setup, troubleshooting, and real-world applications. Analog To Digital Sensor The Analog To Digital (adc ) Sensor allows you to use the built-in ADC in your device to measure a voltage on certain pins. I connected an ESP32 to an AHT20 (an I2C-based temperature and humidity sensor) powered by 5V. This voltage is then converted to data by the HX710B. 5V. I’m having a very hard time finding any examples of this kind of thing Feb 2, 2022 · This article will provide you with a walkthrough on how you can build a water usage meter sensor that integrates with your Home Assistant for under 10 $/EURO without the need for any soldering or coding skills. Oct 29, 2024 · Interface an anemometer with the ESP32 to measure wind speed. The 5V source must be capable of supplying several hundred mA. 3V level, I'm not sure that regardless what that guide claims connecting this is healthy for the micro Nov 22, 2017 · This seemed like a good idea because the Atmega and ESP32 will be installed inside a car with about 15 ft of wire between them on the I²C bus, and the Atmega itself runs on 5V in the first place. Its a basic transducer powered by 5Vs and reads between 0 and 150psi. 14 hours ago · Tengo algunos problemas con mi proyecto. So as long as my input pressure stays below 70psi/3. When your PIR sensor detects motion, it wakes up, takes a photo and saves it in the microSD card. 3v for the esp32 to read it. Oct 16, 2023 · ESP32 Pressure Sensor Wiring Diagram The MPS20N0040D outputs voltage proportionally to the pressure it detects. Discover how to measure voltage with Arduino Nano ESP32, including using a voltage sensor and programming it step-by-step. Mar 5, 2020 · The pressure sensor is 5V so it’s output will range from 0. Typically, the ESP32 is not 5V tolerant on its GPIO pins. 3 / 4096) instead of (5. The x25 is because 1V of input voltagw corresponds to 25psi (voltage range from 0. multimeter calibration is not relevant here. Generaly avoid exceeding 5. The ESP32 KY-051 Voltage Translator / Level Shifter is a powerful KY-0xx module sensor that offers excellent performance and reliability. Sep 29, 2023 · Power the sensors and the ESP32 from any 5V source, including a 5V boost converter. Jul 31, 2025 · I have a question that has really confused me. The ESP32 LD2450 Human Presence Sensor is a powerful Human Presence sensor that offers excellent performance and reliability. Aug 4, 2021 · What are the 5V and VIN pins used for on a DevKitV4 with ESP32 Wrover-B ? Can I power the ESP using one of those pins ? If not, then I am supposed to get a 3V3 power supply and use the 3V3 pin ? ESP32 is a series of low cost, low power system on a chip microcontrollers with integrated Wi-Fi and dual-mode Bluetooth. 3V logic. 3V needed by the MLX90614 sensor, ensuring compatibility between the devices. Back to Troubleshooting ESP32 External Power Guide Learn how to power your ESP32 reliably using external sources. 3V, then it needs to be connected to the 3. The triggered threshold is adjustable via a built-in potentiometer Two output pins: Digital (LOW / HIGH) and Analog Supply voltage: 3. According to the datasheet, the VCC can be from 0 to +7V (5V recommended). Earlier we used motion detection sensors like PIR Sensor to detect motion when any object is moving. 6V so max level is 3. But I saw in some posts that someone said that if the board is being power sourced by USB, then that 5V is also an output. 3 Mini32. My question is can I use the code as it is or should I use (3. how is it please Thank you very much for your help. It uses a simple digital interface, providing an easy way to connect to devices like Arduino or ESP32. 3v. This article is a compilation of 29 free guides for ESP32 sensors and modules. Since my pool would never go above 50psi i simply connected the output to GPIO35 pin. 5V @ 100 psi). ESP32: Available pins vary by variant, see ESP32 pins and Hardware Details. 3V power supply; otherwise, the sensor will be burned out. Explore comprehensive documentation for the ESP32-Controlled Soil Moisture Monitoring and Water Pump System project, including components, wiring, and code. Your PIR sensor has a 3V3 LDO, so it probably runs on 3V3 internally. It should be supplied with 5V, and either levels shifters or voltage divider bridges should be added on the pin ECHO . The ESP32 KY-025 Reed Switch Module is a powerful KY-0xx module sensor that offers excellent performance and reliability. Simple 'as! By maximilianpaulsen and Sensirion Software. Millimeter Wave Presence Sensors With ESP32: Hello everyone! Today, I'll show you how to use millimeter wave sensors, focusing on the LD2410 version C. 3V without changing the characteristics of sensor output signal. Will I be okay connecting both sensors to the same 3. Perfect for DIY electronics and IoT enthusiasts! Jun 25, 2025 · Are you looking for a reliable motion detection solution that works through obstacles and offers greater sensitivity than traditional PIR sensors? Meet the RCWL-0516 Microwave Radar Proximity Sensor —a compact, affordable module that uses microwave Doppler radar to detect motion. println(voltage); // print out the value you read: delay(500); } The sensor is operating on 5V, it is powered by an external power supply. Just make sure that no other ESP32 pin is exposed to a voltage over 3. Is this correct? Can an ESP32 board deliver 5V? Could I for Hello, I have an analog sensor that outputs up to 5v (0 to 5), I’d like to use it with an esp32 but as far as I know, the max gpio input of the esp32 is 3. The ESP32 Pressure Sensor project illustrates how to measure analog values from a pressure sensor using an ESP32 microcontroller. That is, a series of pulses are sent into the ESP32 with a clock signal framing those pulses. Jul 15, 2024 · I am planning to use a ESP32 Dev Board that has a 5v output to power up a sensor. The ESP32 reads digital outputs from the IR sensors to likely make decisions based on line or obstacle detection, and it controls the gearmotors' directions and speeds, possibly for a robot or automated system. 3V level, I'm not sure that regardless what that guide claims connecting this is healthy for the micro Jul 24, 2018 · Re: Sensor with 5V Output Postby Sprite » Wed Jul 25, 2018 2:15 am It's because the ESP32 itself works at 3. This is fine and I can read the signal, but of course it lowers the voltage of the source signal and causes the bike to display an incorrect temperature. While I read that I could use the same power source for both the ESP32 and the sensors, I learned that the ESP32's inputs do not support 5V signals from the sensor. Discover how to connect an ESP32 laser distance sensor and explore its applications. By Sensirion Software. Learn how to use PIR sensors with ESP32 the right way and build motion detection that works. Aug 4, 2024 · I am facing a challenge with powering these sensors because the HC-SR04 requires 5V. The sensor has three pins: “D” for digital output, “+” for power, and “−” for ground, ensuring Apr 17, 2025 · ESP32-based tank level monitor using XKC-Y25-V sensors and ESPHome for real-time Home Assistant integration. Due to the LDO it'll run fine on Feb 6, 2025 · Re: Can I use the 5V power port on the ESP32 to power the sensor? Postby hedayR » Tue Feb 11, 2025 12:17 pm The 5V of the board can supply power to the sensor; if the sensor needs 3. In your case, I'd use a resistive divider (say 10K/4. Feb 28, 2025 · I love the I2C protocol, when I need a sensor, every time, I try to find one with this protocol, I have also written some libraries for various sensors that use I2C. This is very useful if you want to connect an Arduino to an ESP8266. Apr 26, 2022 · attached is the schematic. Another important category of sensors that you need to interface with ESP32 is analog sensors. 5V is okay, that's why there's a big voltage regulator in the ESP32, to lower 5V down slightly to create 4. Edit: There has been some debate on whether the ESP8266 is actually 5V tolerant on GPIO in… Learn how to use ESP32 to control fan. I currently have a soil moisture sensor running smoothly on an esp32 in esphome. It's my understanding that I should use an Adafruit MiniBoost 5V @ 1A - TPS61023 and partner it with an Bi-directional Logic Level Converter - BSS138 so that the TPS61023 will power my sensor (s) at 5v, and the logic level converter (being fed 5v from Dec 6, 2024 · ESP32 Setup Made Easy: Complete Guide to Connectivity, Troubleshooting, and Power Management Master your ESP32 projects with this comprehensive guide covering setup, Wi-Fi, Bluetooth, sensor integration, power management, and troubleshooting. Learn how to use ultrasonic sensor HC-SR04 with ESP32, how ultrasonic sensor works, how to connect ultrasonic sensor to ESP32, how to code for ultrasonic sensor, how to program ESP32 step by step. trueI've started experimenting with ESP32 after finishing the Arduino starter kit and testing some other sensors. Oct 9, 2021 · My application is using a voltage divider to lower a possible 5 V signal (output of 5 V pressure sensor) to an input of my ESP32 dev board (doit ESP32devkit1 v4). 5 is because 0 psi corresponds to 0. Nov 28, 2022 · The ADC of the ESP32 has several flaws: ADC2 cannot be used with enabled WiFi since it is used internally by the WiFi driver. Apr 11, 2025 · In this project, we're going to make a motion sensor detector with photo capture using an ESP32-CAM. With Vcc = 5V, the sensor output voltage varies between 0. As I want to use the full range of the sensor and want to have a good accuracy I choose to use a ads1115 and instead of a voltage divider a logic level converter board. The ESP32 KY-054 Phototransistor Module is a powerful KY-0xx module sensor that offers excellent performance and reliability. Jan 5, 2017 · Can ESP32 accept 5v TTL level signal on GPIO inputs or it will fry the input pin if not the whole module? ESP-WROOM-32 datasheet clearly states that maximum input for high logic level is VDD+0. Though i’m a bit frightened, it should be doable, but before ordering all Parts i want to make sure that it basically will work. As a first project, I'd like to build a plant watering system with a soil moisture sensor, a water level sensor and a 5v dc water pump (Ideally I'd like to use the wifi module to trigger an API to shoot mails to a group of people when the water tank is at critical level). There is a wide variety of sensors, modules, and peripherals compatible with the ESP32 boards. Is that the best way to do it? I was thinking I could just supply 5V to the ADS1115 and then use the whole 0. I'll be powerin Mar 5, 2025 · Applying these 5V signal directly to an ESP32 or STM32 GPIO pins exceeds its maximum voltage rating and makes damage to the pin or the entire chip. Aug 14, 2019 · Your devboard probably has a secondary chip to allow it to work on 5V as well, but the ESP32 by itself will malfunction and potentially release the magic smoke when you try to power it from 5V. The system aims to maintain a specific temperature range (30 to 32 degrees Celsius) in industrial environments. The specs are 0psi=0 Dec 22, 2021 · () These ESP32 modules include a diode between USB +5V and internal +5V on the "5V" pin. 5V range of the sensor. 3. Summary Powering an ESP32 from a 12V source is Re: Sensor with 5V Output Postby ESP_Sprite » Wed Jul 25, 2018 2:15 am It's because the ESP32 itself works at 3. Ensure your buck converter can supply at least 1A or more, if additional peripherals (e. This flow sensor has blades inside and is working on the principle of hall effect. 65v so that if the signal wire ever reaches say 5v it will read that as 3. Hello, I have an analog sensor that outputs up to 5v (0 to 5), I’d like to use it with an esp32 but as far as I know, the max gpio input of the esp32 is 3. Find this and other ESP32 tutorials on esp32io. I'd like to add a photoresistor to the esp32. nRF52840: AIN0 through AIN7, VDD, VDDHDIV5 can be used. In this detailed guide, we’ll explore how to interface the RCWL-0516 with an ESP32 microcontroller, how it Jul 28, 2025 · I am creating a data logger using the ESP32 S3 Mini 1 N8 and utilizing the I2C interface, which operates at 3. The firmware is designed to read pressure data from the sensor and support integration with smart home platforms. Learn how MQ2 gas sensor works, how to connect MQ2 gas sensor to ESP32, how to program ESP32 step by step. I have an ESP32 that has an analog at about 3. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management Mar 27, 2023 · ESPHome smartin March 27, 2023, 3:20pm 1 I just started with ESP Devices recently, and now it looks like i have to do my first time soldering I would need just need to turn on/off a +5V Device by a GPIO. So if I supply a 5v power input to the board, I would be able to get a 5v output from the pin right? Learn how to suplly the power to ESP32 and sensors via USB port or Vin pin. Power is supplied by a 6V battery connected to the motor driver, which also provides 5V to the ESP32 and the IR sensors. All sensors and modules are fully compatible with the ESP32 expansion board. Pressure sensors are crucial in various applications such as weather monitoring, industrial automation, and robotics for precise measurement of pressure changes. ## DO (Digital Output)pin: The module has a built-in potentiometer that you can turn to Learn how to connect DHT11 sensor to ESP32, how to program ESP32 to read temperature and humidity from DHT11. The ESP32 KY-050 Ultrasonic Distance Sensor Module is a powerful KY-0xx module sensor that offers excellent performance and reliability. Learn how to to power and connect the sensor to the ESP. I'll be powering the ESP32 with 5V through the Vin pin. Somewhere I saw 100K and 200K ohm, in other places only 33K and 18K ohm. I am currently sending the signal to an ESP32 and using a voltage divider. 3V? The HC-SR04 module is not the most relevant sensor for ESP32 boards because it works in 5V (5V logic levels), whereas ESP32 works in 3. Learn how to connect and control it fast. 3v Key Features Digital LDR Photosensitive Light Sensor Module. here is the datasheet here is the link to the library the ESP32 is a bare wroom32. With support for multiple development platforms including Arduino, ESP-IDF, ESPHome, PlatformIO, and MicroPython, it's a versatile choice for your IoT projects. This article will also cover the configuration that’s needed in Home Assistants to translate the ‘pulse’ to liters … Continue reading "Build a cheap water usage sensor using Oct 27, 2025 · This tutorial shows how to detect motion with ESP32 using a PIR motion sensor. The HX710B, on the other hand, communicates with the ESP32 serially. My question is, why wasn't the ESP32 damaged by this 5V connection? I looked at the datasheet for the development board, but I couldn't find any May 1, 2025 · The sensor can be powered with 5V, which I get from the 5V output of the ESP32-C6 Zero. 3V. In this article we are going to take a look on ESP32 I2C features and check some problem. Nov 26, 2024 · Interface an anemometer to measure wind speed with the ESP32 and ESP8266 NodeMCU boards programmed with MicroPython. The PIR Sensor works by measuring the infrared (IR) light emitted from, or reflected by, that object. 3V output, so when hooking these up, pay attention to the sensor's requirements. Is there anyway I can read this signal on the ESP32 while leaving the Feb 1, 2023 · So I've got a YFS201 sensor which I was using with a Arduino Nano. Discover how to stream video, fix common errors, and explore creative IoT camera projects. 3 - 5V DC Digital LDR light sensor for Arduino, ESP32, ESP8266, Raspberry Pi, or any 5V or 3. In Apr 11, 2025 · In this project, we're going to make a motion sensor detector with photo capture using an ESP32-CAM. Learn how to use piezo buzzer with ESP32, how piezo buzzer works, how to connect piezo buzzer to ESP32, how to code for piezo buzzer using ESP32, how to program ESP32 step by step. ESP8266: Only pin A0 (GPIO17) can be used. The detail instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. 3V and I need to connect my sensors to esp32 but my sensors requires a 5V. 3V or 5V DC, making it compatible with a wide range of microcontroller boards. I don't think I'm actually getting the 5V needed to power the sensor, and I've heard that it really needs 5V to get it properly working. 5V on the Vin pin, as it may damage the onboard regulator. But, I am using an ESP32. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management Mar 5, 2020 · The pressure sensor is 5V so it’s output will range from 0. 3v inputs. I connected everything according to the scheme below. Jul 9, 2024 · 4. To solve this problem, we have to convert 5V signal from sensor output to 3. It is safe to apply 5V to the ESP32 Vcc pin. 3 where max VDD is 3. Estoy intentando construir un circuito que controle varios componentes para una maqueta. 5V to 4. Hi, I'm trying to connect my ultrasonic sensor HC-SR04 with the USB pin of my Adafruit ESP32 feather, but I get a distance of 0 every time. We'll cover how to power and connect the sensor to the ESP32 board, and write a simple code to get wind speed values in different units. Feb 2, 2022 · This article will provide you with a walkthrough on how you can build a water usage meter sensor that integrates with your Home Assistant for under 10 $/EURO without the need for any soldering or coding skills. The 5 new sensors will have a maximum cable length of 5 meters. . 5V @ 0psi to 4. In this lesson, you will learn how to power your ESP32 dev kit. We provide detailed instructions, codes, wiring diagrams, and video tutorials, along with explanations of each code line to assist you in getting started with Arduino Nano ESP32 easily. Jul 29, 2024 · Learn how to build a cost-effective and versatile smart gas detector using an ESP32 microcontroller and an MQ-2 gas sensor with our step-by-step instructions. This article will also cover the configuration that’s needed in Home Assistants to translate the ‘pulse’ to liters … Continue reading "Build a cheap water usage sensor using ESP32 is a feature-rich SoC with integrated Wi-Fi and Bluetooth connectivity for a wide-range of IoT applications. it is powered from 13v from a large VFD regulated to 5v via a buck converter. You can watch the video, or, if you are the "reading" type, you can read the text. In my, really little, time with ESP32 (with just ESPHome) I was just using the 3V3 pin as power for my sensors. I understand that the ESP32 needs 3. 3V Mod for Ultrasonic Sensors (prepare HC-SR04 for 3. 5v on its signal wire, I need the ESP32 to read the voltage from that signal wire as 1. 5V, I’m not sure I want to voltage divide it down because it seems that might cause me to lose some resolution. 7kΩ -> Echo pin -> 4. I’m having a very hard time finding any examples of this kind of thing The ESP32 KY-021 Mini Magnetic Reed Switch Module is a powerful KY-0xx module sensor that offers excellent performance and reliability. It includes in-built antenna switches, RF balun, power amplifier, low-noise receive amplifier, filters, and power management This repository provides the hardware design, block diagrams, and schematics for the ESP32-C6 Multi-Sensor Board. Jul 13, 2020 · The setup will be powered by a 5v /2A Power Supply. The detailed instruction, code, wiring diagram, video tutorial, line-by-line code explanation are provided to help you quickly get started with ESP32. Jan 13, 2025 · PIR sensors don’t just detect motion—they test your patience. My question is, why wasn't the ESP32 damaged by this 5V connection? I looked at the datasheet for the development board, but I couldn't find any level shifters or protection circuits. Jan 21, 2025 · This tilt sensor tutorial for ESP32 starts simple—but the real fun begins when motion triggers go wild. Learn about ESP32 features, wiring, code examples, and real-world use cases This project provides firmware for an ESP32-based pressure sensor system using the DFRobot SEN0257 pressure sensor. g. 5V sensors for esp32?? Hello guys I'm not familiar with esp32 but recently I found out that esp32 only provides 3. (Typical pressures for my system are about 25-30psi) 4 Likes Jul 15, 2024 · I am trying to program HC-SR04 Sensor to measure distance and send the measurements through LoRa. Now I am employing a ESP32 Node MCU which uses 3. Now, if you are familiar with how analogRead works on any Arduino board, like Feb 20, 2025 · The sensor requires 24V DC, but I read it works fine with 10-30V, so I connected it to a 12V DC adapter I had. 5V-4. 3V Logic on ESP32/ESP8266, Particle Photon, Etc. This makes it ideal for ESP32-based applications that require multiple temperature readings. 3V output for low current modules like the AHT20; both of these apply whilst the USB connector is supplying 5V. 3v from the ESP32 Board. Features 3-point level detection and waterproof design. Now, I think I read somewhere that the ESP32 I²C pins are 5-volt tolerant, provided that you use higher-value resistors, maybe like my 4K7 ones. Feb 16, 2023 · But in my current situation, using the ESP32 which has 2 I2C buses so I can put the 3. 3V microcontroller. 7K) to get the voltage in range of the ESP32 I/O pins. The ADC can only measure a voltage between 0 and 3. Jul 4, 2025 · What is the DS18B20 Temperature Sensor? The DS18B20 is a digital temperature sensor from Maxim Integrated that communicates using the One-Wire protocol. You have two sensors, having the same I2C address, which you want to connect to your ESP32 by using a separate I2C bus for each sensor. The sensor has three pins: “D” for digital output, “+” for power, and “−” for ground, ensuring Feb 27, 2024 · Plug in your Sensirion sensor, see live measurements. Aug 17, 2025 · IoT Environmental Monitoring using ESP32 (Wokwi Simulation) – Monitors temperature, humidity, and gas levels using DHT22 and gas sensors on an ESP32. It utilizes IoT capabilities with Ubidots for remote Nov 14, 2025 · Learn how to set up and use the ESP32-CAM in this complete step-by-step tutorial. Top avant115 Posts: 2 Joined: Tue Jul 24, 2018 5: This package includes 50 pieces of photocell light sensor that work with Arduino, ESP32, ESP8266, Raspberry Pi, or any 5V or 3. Since the Easy IOT - ESP32 Based RF Sensor Hub: This tutorial is part of a series of tutorials, building a network of devices that can be controlled via a radio link from a central hub device. So if your device is USB-powered, you can absolutely use the "+5V" pin to power your 5V sensors, however due to the diode it will be closer to 4. When I connect the same sensor and circuit to an Arduino Uno (using A0 pin), it works fine and gives good analog readings. Aug 4, 2024 · The sensor itself needs to be operated from 5V otherwise it malfunctions. But like any electronic device, you need to feed the ESP32 some power […] Unfortunately the sensor will return voltage anywhere from 0 - 5v, so I need to convert that down to 0-3. - g1ibby/water-tank-monitor Oct 29, 2024 · Interface an anemometer with the ESP32 to measure wind speed. This sensor is fascinating because it expands our capabilities in detecting human presence far beyond what traditional passive infrared sensor… Jul 15, 2024 · I am trying to program HC-SR04 Sensor to measure distance and send the measurements through LoRa. This circuit features an ESP32 microcontroller interfaced with a soil moisture sensor and a DHT11 temperature and humidity sensor, controlling a 5V mini water pump through a relay. 0)? This project implements a temperature control system using an ESP32 microcontroller, L298N motor driver, 5V relay, and sensors. Sep 21, 2024 · The project “Water Tank and Water Pump Automation using ESP32, Waterproof Ultrasonic Sensor, Relay Module, and Blynk IoT App” can have a wide range of applications across different sectors and environments. What should I do? My board is esp32 TTGO T7 V1. ): TL;DR: On the sensor, cut the trace to the Echo pin, then re-connect it using a voltage divider (Echo trace -> 2. ESP32 Pinout Overview Understanding the ESP32’s pinout is crucial for connecting sensors, actuators, and other components to your projects.